| ; RUN: opt < %s -S -passes=loop-unroll -unroll-runtime -unroll-threshold=40 -unroll-max-percent-threshold-boost=100 | FileCheck %s |
| |
| @known_constant = internal unnamed_addr constant [9 x i32] [i32 0, i32 -1, i32 0, i32 -1, i32 5, i32 -1, i32 0, i32 -1, i32 0], align 16 |
| |
| ; CHECK-LABEL: @bar_prof |
| ; CHECK: loop: |
| ; CHECK: %mul = mul |
| ; CHECK: %mul.1 = mul |
| ; CHECK: %mul.2 = mul |
| ; CHECK: %mul.3 = mul |
| ; CHECK: br i1 %niter.ncmp.7, label %loop.end.unr-lcssa.loopexit, label %loop, !prof [[PROF0:![0-9]+]] |
| ; CHECK: loop.epil: |
| ; CHECK: br i1 %epil.iter.cmp, label %loop.epil, label %loop.end.epilog-lcssa, !prof [[PROF1:![0-9]+]], !llvm.loop {{![0-9]+}} |
| define i32 @bar_prof(ptr noalias nocapture readonly %src, i64 %c) !prof !1 { |
| entry: |
| br label %loop |
| |
| loop: |
| %iv = phi i64 [ 0, %entry ], [ %inc, %loop ] |
| %r = phi i32 [ 0, %entry ], [ %add, %loop ] |
| %arrayidx = getelementptr inbounds i32, ptr %src, i64 %iv |
| %src_element = load i32, ptr %arrayidx, align 4 |
| %array_const_idx = getelementptr inbounds [9 x i32], ptr @known_constant, i64 0, i64 %iv |
| %const_array_element = load i32, ptr %array_const_idx, align 4 |
| %mul = mul nsw i32 %src_element, %const_array_element |
| %add = add nsw i32 %mul, %r |
| %inc = add nuw nsw i64 %iv, 1 |
| %exitcond86.i = icmp eq i64 %inc, %c |
| br i1 %exitcond86.i, label %loop.end, label %loop, !prof !2 |
| |
| loop.end: |
| %r.lcssa = phi i32 [ %r, %loop ] |
| ret i32 %r.lcssa |
| } |
| |
| ; CHECK-LABEL: @bar_prof_flat |
| ; CHECK-NOT: loop.epil |
| define i32 @bar_prof_flat(ptr noalias nocapture readonly %src, i64 %c) !prof !1 { |
| entry: |
| br label %loop |
| |
| loop: |
| %iv = phi i64 [ 0, %entry ], [ %inc, %loop ] |
| %r = phi i32 [ 0, %entry ], [ %add, %loop ] |
| %arrayidx = getelementptr inbounds i32, ptr %src, i64 %iv |
| %src_element = load i32, ptr %arrayidx, align 4 |
| %array_const_idx = getelementptr inbounds [9 x i32], ptr @known_constant, i64 0, i64 %iv |
| %const_array_element = load i32, ptr %array_const_idx, align 4 |
| %mul = mul nsw i32 %src_element, %const_array_element |
| %add = add nsw i32 %mul, %r |
| %inc = add nuw nsw i64 %iv, 1 |
| %exitcond86.i = icmp eq i64 %inc, %c |
| br i1 %exitcond86.i, label %loop, label %loop.end, !prof !2 |
| |
| loop.end: |
| %r.lcssa = phi i32 [ %r, %loop ] |
| ret i32 %r.lcssa |
| } |
| |
| !1 = !{!"function_entry_count", i64 1} |
| !2 = !{!"branch_weights", i32 1, i32 1000} |
| |
| ; CHECK: [[PROF0]] = !{!"branch_weights", i32 1, i32 124} |
| ; CHECK: [[PROF1]] = !{!"branch_weights", i32 3, i32 1} |